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Assets Held for Sale (Assets and Liabilities Held for Sale) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current assets held for sale: |  |
Cash and equivalents | $ 69 | $ 42
Accounts receivable | 13,236 | 5,726
Other current assets | 1,280 | 571
Current assets held for sale | 14,585 | 6,339
Long-term assets held for sale: |  |
Property and equipment | 89,643 | 33,624
Goodwill | 29,295 | 244
Other assets | 64 | 121
Long-term assets held for sale | 119,002 | 33,989
Current liabilities held for sale: |  |
Accounts payable | 4,045 | 1,320
Accrued liabilities | 1,412 | 1,811
Deferred revenue | 2,341 | 252
Current liabilities held for sale | 7,798 | $ 3,383
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent [Abstract] |  |
Other liabilities | $ 449 |

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